Cultivo orgânico de cultivares de cebola nas condições da Baixada Fluminense

Abstract

Organic cultivation of onion cultivars in the conditions of the Lowlands of Rio de Janeiro state, BrazilThe agronomic performance and yield of onion cultivars was evaluated on organic farming conditions in the Lowlands of Rio de Janeiro state, Brazil, also named Baixada Fluminense, from June to October 2010, in the municipality of Seropédica. The statistical design consisted of 10 treatments arranged in a randomized block design with four replications. We evaluated the total yield, the marketable and the unmarketable, as well as the classification of onions. The total yield of bulbs ranged from 14.42 to 24.09 t ha -1 , while marketable yield ranged from 14.28 to 24.09 t ha -1 . The highest yielding cultivars which can be recommended were Alfa Tropical, Alfa São Francisco, Baia Periforme, Madrugada, Primavera, Jubileu, Pêra Norte and Lola; while the lowest yielding cultivars were the Vale Ouro IPA 11 and the Franciscana IPA 10. The production of 'refused' bulbs was very low, and the cultivars Alfa Tropical, Alfa and Lola did not produce this kind of bulbs. The average weight of bulbs ranged from 54.1 to 90.3 g, and the cultivars Franciscana IPA 10 and Vale Ouro IPA 11 were those with the lowest values of 'refused' bulbs. Organic farming of onions in the studied conditions (Baixada Fluminense) is possible and capable of produce yields similar to those obtained in conventional farming.

Genetic Parameters and Diversity, and Correlations in Onion Strains

“…Some studies by other authors showed that the CV values obtained in this study are in the range that is commonly obtained in research with onions. Ricci et al (2014) reached values of 12.5%, 12.5%, and 13.7%.…”

Doses De Potássio Na Produtividade E Armazenamento Póscolheita De Cultivares De Cebola

“…A cultivar a Alfa São Francisco apresentou-se maior massa fresca de bulbo (77,4 g bulbo -1 ) que a cultivar Alfa Tropical (70,1 g bulbo -1 ) (Tabela 1). Resultados semelhantes foram obtidos por Ricci et al (2014) para a cultivar Alfa São Francisco (77,8 g bulbo -1 ), sendo para a cultivar Alfa Tropical pouco superior com 90,3 g bulbo -1 .…”

“…Quando cultivadas no sistema orgânico de cultivo a cultivar Alfa São Francisco com 22,3 t ha -1 não apresentou-se estatisticamente superior a cultivar Alfa Tropical com 19,4 t ha -1 (COSTA et al, 2008). Resultados semelhantes foram obtidos por Ricci et al (2014), na Baixada Fluminense-RJ, onde as cultivares apresentaram produtividades 24,1 t ha -1 ('Alfa Tropical') e 20,7 t ha -1 ('Alfa São Francisco'), sem evidenciar diferenças significativas. DOSES DE POTÁSSIO NA PRODUTIVIDADE E ARMAZENAMENTO PÓS-COLHEITA DE CULTIVARES DE CEBOLA O objetivo desse trabalho foi avaliar os efeitos de doses de potássio sobre a produtividade e armazenamento pós-colheita de bulbos de cultivares de cebola, em solo com alto teor do nutriente, em cultivo de verão, no Submédio do Vale do São Francisco.…”